Switch



Sept. 29, 1931.

B. N, BRUNBERG SWITCH Filed Jan. 2l, 1928 ifetented Sept. 29, 193iUNITED STATES yPATENTl oFF/ICE BENNIE N. BRUNBERG, OF PROCTOR,MINNESOTA, ASSIGNOR 0F THIRTY-FIVE PEB CENT '.lO CHARLES G. WOOD .ANDTWENTY PER CENT TO AXEL JOHNSON, BOTH OF PROCTOR, MINNESOTA SWITCHlApplication led January 21, 192.8. Serial No. 248,460.

This invention relates to electric switches and has special reference toa time switch whereby the switch may be thrown and not function until apredetermined lapse of time.

The principal object of the invention is to provide a more practical,simple, and dependable switch of this character than heretofore known.

Other objects and advantages of the invention will appear in the furtherdescription thereof.y

Referring now to the accompanying drawings, forming part of thisapplication, and wherein like reference characters indicate like parts:

Figure 1 is a central vertical section through the operating shaft ofthe switch, and

Figure 2 is a similar section taken at right angles to Figure 1.`

1 represents a rectangularly shaped housing made of any suitableinsulating material such as bakelite or the like and preferably formedinto the five sided receptacle l provided with the removable cover orback 2. Within this receptacle is rotatably mounted the cylinder 3having one end permanently closed and the other end open for purposeshereinafter described. This cylinder upon the button controlled side isprovided with the telescopic trunnion comprising the female member 5fixed to the side of the cylinder and the male member 5 lixed to theinner face of the box or receptacle, and axially of the female member 4is a hub-like eX- tension 6, it being slotted diametrically, and theinnermost terminus of the stem 7 of the button 8 has a projection 9which registers within the diametrical slot in the hub 6 when the stemis in position for rotating the cylinder 3. This stem is held inposition by a through pin mounted within the member 5 so as to beengaged within the circumferential groove 10 about the stem 7.

The trunnion upon the opposite side comprises the member 11 fixed to theside of the cylinder 3 having the axis 12 extending therefrom and intothe female member 13 fixed to the back or cover 2. The member 11 is alsoprovided with knobs 14 so positioned as to register with similardepressions in the collar l5 mounted upon the female member 13 in such amanner as to hold the cylinder in vertical position when the switch isturned, and the exterior of the member 13 is squared to prevent rotationof the member 15. This member or collar 15 is held normally impingingthe member 11 by means of a pair of suitable -leaf springs indicated at16, one upon either side of the member 13 and carried within depressionsof the collar so as not to become dislodged except when the vcover 2 isremoved. Thus when the cylinder 3 is rotated by the switch 8 the members11 and 15 will separate the depth of the members 14 and permit of thecylinder revolving until the members 14 and 15 again register, which asis obvious will tend to hold the switch in vertical position which isessential for its proper functioning in either on or off position. i

Within the cylinder 3 is mounted a comparatively heavy metal floatingpiston 17, it having an axial projection 18 which when the piston is inits lowermost position, after having assumed such by gravity when thecylinder is adjusted to the position shown in Figure 2 of the drawings,will engage the spring leaf 19 of the electric circuit through thereceptacle and separate its free terminus 2() from the free terminus 21of the opposite spring leaf 22 of the circuit; the other ends of thesetwo leaves having any desired terminal post for outside connection,those here employed being illustrated at 23.

A stop ring 24 is installed adjacent the upper end of the cylinder 3 soas to properly limit the descent of the piston 17 and a suitabledistance from the piston when in this position is located a relief port25 through the wall of the cylinder so that as the piston, descending inthe cylinder passes such port the air admitted therethrough will permitof the piston suddenly dropping to its lowermost position indicated inFigure 2, thus more effectually and quickly opening the circuit.

In the closed head of the cylinder 1 is installed an adjustment plug 26having a needle controlled valve indicated at 27 which governs the port28 leading into the bore of the cylinder and by which adjustment plugthe time required for gravitating of the piston is predetermined so thatthe element which is employed in the control of the switch may be variedt'o suit the desired circumstances.

From the foregoing it is evident that I have devised a simple andpractical tirne switch, which may be readily assembled, and as is notedby the removal of the cover or back of the switch box the entiremechanism may be removed for repair or adjustment, and one that Willdoubtless function adequately for the purpose intended.

Having thus described my invention, what l claim and desire to secure byLetters Patent, is:

The combination with a time switch of the class described having arotative cylinder and gravity piston therein for control of saine, ofcontact points spaced adjacent the path of the cylinder and independentthereof, and means whereby when the cylinder is in one of its verticalpositions the contact points Will be opened by t-he action of thepiston, and when the cylinder is in its alternative vertical positionthe contact points Will remain closed.

In testimony whereof I affix mv signature.

BENNIE N. BRUNBE'RG.'

